alexa Psychogenic (Functional) Jaw-Opening Dystonia: Three Case Reports and a Comparison of Symptomatic Jaw-Opening Dystonia Associated with Organic Causes in the Literature| Abstract
ISSN: 2329-6895

Journal of Neurological Disorders
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  • Research Article   
  • J Neurol Disord 2017, Vol 5(5): 365
  • DOI: 10.4172/2329-6895.1000365

Psychogenic (Functional) Jaw-Opening Dystonia: Three Case Reports and a Comparison of Symptomatic Jaw-Opening Dystonia Associated with Organic Causes in the Literature

Won Tae Yoon1* and Eung Seok Oh2
1Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, , Seoul, Republic of Korea
2Department of Neurology, Chungnam National University Hospital, , Chungnam National University School of Medicine, Daejeon, Republic of Korea
*Corresponding Author : Won Tae Yoon, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea, Tel: 82-2- 2001-1938, Email: [email protected]

Received Date: Sep 18, 2017 / Accepted Date: Oct 15, 2017 / Published Date: Nov 18, 2017

Abstract

Background: Jaw-opening dystonia is very rarely reported, and involuntary jaw-opening dystonia as an initial manifestation of psychogenic (functional) movement disorder has not yet been reported. This study aimed to report unusual cases of psychogenic (functional) jaw-opening dystonia and to compare the clinical patterns between organic and psychogenic (functional) jaw-opening dystonia. Method: We enrolled three psychogenic (functional) movement disorder patients presenting involuntary severe jaw-opening dystonia as an initial manifestation. Moreover, we review previously reported cases and analyze the clinical pattern of organic psychogenic (functional) jaw-opening dystonia in comparison with our cases. Results: Among 10 cases, including our cases, the most common pattern of organic jaw-opening dystonic symptoms was the sustained pattern. By contrast, all three patients with psychogenic (functional) jaw-opening dystonia presented with a paroxysmal pattern. The major neuro-radiologically associated localizations of organic jaw-opening dystonia were the cerebellum and basal ganglia. Sensory feedback or “sensory tricks” were only observed in organic jaw-opening dystonia. Conclusion: The results of this clinically investigative study may provide support for the differential diagnosis of jaw-opening dystonia between organic and psychogenic (functional) etiologies. Additionally, if paroxysmal jawopening dystonia combined with inconsistent, incongruous hyperkinetic movement symptoms is present, diagnosis of a psychogenic (functional) movement disorder should be considered.

Keywords: Jaw-opening dystonia; Psychogenic; Organic; Sensory trick; Botulinum toxin

Citation: Yoon WT, Oh ES (2017) Psychogenic (Functional) Jaw-Opening Dystonia: Three Case Reports and a Comparison of Symptomatic Jaw-Opening Dystonia Associated with Organic Causes in the Literature. J Neurol Disord 5: 365. Doi: 10.4172/2329-6895.1000365

Copyright: © (2017) Yoon WT, et al. Psychogenic (Functional) Jaw-Opening Dystonia: Three Case Reports and a Comparison of Symptomatic Jaw-Opening Dystonia Associated with Organic Causes in the Literature. J Neurol Disord 5: 365. doi:10.4172/2329-6895.1000365

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